import { storeToRefs } from 'pinia'
import { DEFAULT_PRIMARY } from '@/config'
import { useAppStore } from '@/stores/modules/app'
import { getLightColor, getDarkColor } from '@/utils/color'
import { menuTheme } from '@/styles/theme/menu'
import { asideTheme } from '@/styles/theme/aside'
import { headerTheme } from '@/styles/theme/header'
import type { Theme } from '@/hooks/interface'
import { ElMessage } from 'element-plus'

/**
 * @description 全局主题 hooks
 * */
export const useTheme = () => {
  const appStore = useAppStore()
  const { primary, isDark, isGrey, isWeak, layout, asideInverted, headerInverted } =
    storeToRefs(appStore)

  // 切换暗黑模式 ==> 并带修改主题颜色、侧边栏、头部颜色
  const switchDark = () => {
    const html = document.documentElement
    html.setAttribute('class', isDark.value ? 'dark' : '')
    changePrimary(primary.value)
    setAsideTheme()
    setHeaderTheme()
  }

  // 修改主题颜色
  const changePrimary = (val: string | null) => {
    if (!val) {
      val = DEFAULT_PRIMARY
      ElMessage({ type: 'success', message: `主题颜色已重置为 ${DEFAULT_PRIMARY}` })
    }
    // 计算主题颜色变化
    document.documentElement.style.setProperty('--el-color-primary', val)
    document.documentElement.style.setProperty(
      '--el-color-primary-dark-2',
      isDark.value ? `${getLightColor(val, 0.2)}` : `${getDarkColor(val, 0.3)}`
    )
    for (let i = 1; i <= 9; i++) {
      const primaryColor = isDark.value
        ? `${getDarkColor(val, i / 10)}`
        : `${getLightColor(val, i / 10)}`
      document.documentElement.style.setProperty(`--el-color-primary-light-${i}`, primaryColor)
    }
    appStore.changePrimary(val)
  }

  // 灰色和弱色切换
  const changeGreyOrWeak = (type: Theme.GreyOrWeakType, value: boolean) => {
    const body = document.body
    if (!value) {
      return body.removeAttribute('style')
    }
    const styles: Record<Theme.GreyOrWeakType, string> = {
      grey: 'filter: grayscale(1)',
      weak: 'filter: invert(80%)'
    }
    body.setAttribute('style', styles[type])
    if (type === 'grey') {
      appStore.changeIsWeak(false)
    } else {
      appStore.changeIsGrey(false)
    }
  }

  // 设置菜单样式
  const setMenuTheme = () => {
    let type: Theme.ThemeType = 'light'
    if (layout.value === 'transverse' && headerInverted.value) type = 'inverted'
    if (layout.value !== 'transverse' && asideInverted.value) type = 'inverted'
    if (isDark.value) type = 'dark'
    const theme = menuTheme[type]
    for (const [key, value] of Object.entries(theme)) {
      document.documentElement.style.setProperty(key, value)
    }
  }

  // 设置侧边栏样式
  const setAsideTheme = () => {
    let type: Theme.ThemeType = 'light'
    if (asideInverted.value) type = 'inverted'
    if (isDark.value) type = 'dark'
    const theme = asideTheme[type]
    for (const [key, value] of Object.entries(theme)) {
      document.documentElement.style.setProperty(key, value)
    }
    setMenuTheme()
  }

  // 设置头部样式
  const setHeaderTheme = () => {
    let type: Theme.ThemeType = 'light'
    if (headerInverted.value) type = 'inverted'
    if (isDark.value) type = 'dark'
    const theme = headerTheme[type]
    for (const [key, value] of Object.entries(theme)) {
      document.documentElement.style.setProperty(key, value)
    }
    setMenuTheme()
  }

  // init theme
  const initTheme = () => {
    switchDark()
    if (isGrey.value) changeGreyOrWeak('grey', true)
    if (isWeak.value) changeGreyOrWeak('weak', true)
  }

  return {
    initTheme,
    switchDark,
    changePrimary,
    changeGreyOrWeak,
    setAsideTheme,
    setHeaderTheme
  }
}
